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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12351521 B1

PDFFull Text
Date of Patent:
Jul. 08, 2025

Filed:

Aug. 30, 2019

Silicon nitride ceramic material for mobile phone rear cover and preparation method therefor

Applicant:

Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, CN;

Inventors:

Jingxian Zhang, Shanghai, CN;

Yusen Duan, Shanghai, CN;

Ning Liu, Shanghai, CN;

Ruixin Ma, Shanghai, CN;

Dongliang Jiang, Shanghai, CN;

Assignee:

SHANGHAI INSTITUTE OF CERAMICS, CHINESE ACADEMY OF SCIENCES, Shanghai, CN;

Attorney:

Alleman Hall & Tuttle LLP

Primary Examiner:

Sally A Merkling

Assistant Examiner:

Logan Edward Laclair

Int. Cl.
CPC ...
C04B 35/591 (2006.01); C04B 35/626 (2006.01); C04B 35/634 (2006.01); H04M 1/02 (2006.01);
U.S. Cl.
CPC ...
C04B 35/591 (2013.01); C04B 35/6342 (2013.01); H04M 1/026 (2013.01); C04B 35/6261 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3225 (2013.01); C04B 2235/3241 (2013.01); C04B 2235/6586 (2013.01); C04B 2235/77 (2013.01); C04B 2235/9607 (2013.01);
Abstract

A silicon nitride ceramic material for a mobile phone rear cover and a preparation method therefor. The method comprises: using a mixture of a silicon source, a colorant, and a sintering aid as raw materials, mixing the raw material components, and performing shaping and sintering to obtain the silicon nitride ceramic material. The toughness of the silicon nitride ceramic material can reach more than 12 MPa·m; the thermal conductivity thereof can reach 40 to 70 W/m·K; and a dielectric loss thereof is 10.

Find Patent Forward Citations

Zhang, Jingxian. (2025). Silicon nitride ceramic material for mobile phone rear cover and preparation method therefor (U.S. Patent No. 12351521). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12351521

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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